External Start Enable (Pin 7) - Siemens SIMATIC S5 Manual

IP 266
2.5.4

External Start Enable (Pin 7)

"External Start Enable" allows you to make the start of a positioning operation
dependent on an external event, such as a signal from another IP 266 (for
instance switching function M99, position reached).
A positioning operation cannot be started on the IP 266 unless this signal is
present.
The signal also makes it possible to disable processing of a machining block or
dwell. The machining program can be resumed at the point of interruption by
activating the signal.
Note:
The "External Start Enable" signal does not interrupt a positioning operation
or dwell that is currently in progress. Blocks belonging to G10 (see Section 5.4)
are treated as two separate blocks.
The polarity of the "External Start Enable" signal is not programmable. The input
must be wired as NO contact.
EWA 4NEB 812 6057-02
Technical Description of the IP 266
2-13